ASTM D – Designation: D – 08 Standard Test Methods for Measuring Adhesion by Tape Test. Buy ASTM D TEST METHODS FOR MEASURING ADHESION BY TAPE TEST from SAI Global. ASTM D Historical Standard: ASTM D Standard Test Methods for Measuring Adhesion by Tape Test. SUPERSEDED (see Active link, below).
|Published (Last):||27 January 2009|
|PDF File Size:||4.24 Mb|
|ePub File Size:||18.45 Mb|
|Price:||Free* [*Free Regsitration Required]|
Applied to metals, it is economical to perform, lends itself to job site application, and most importantly, after decades of use, people feel comfortable with it. No further reproductions authorized.
Today, some 12, ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. NOTE 1—This test method has been reported being used to measure adhesion of organic coatings on soft substrates for example, wood and plastic.
They do not distinguish between higher levels of adhesion for which more sophisticated methods of measurement are required. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Because the substrate and its surface preparation or lack thereof have a drastic effect on the adhesion of coatings, a method to evaluate adhesion of a coating to different substrates or surface treatments, or of different coatings to the same substrate, is of considerable usefulness in the industry.
Test Methods D was developed with metal as the substrate and, in the absense of supporting precision and bias data, is so limited.
ASTM D – 09 Standard Test Methods for Measuring Adhesion by Tape Test [PDF] – Все для студента
A number in parentheses indicates the year of last reapproval. However, the precision values given in Flaking and detachment worse than Grade 1. Discard cutting tools that develop nicks or other defects that tear the lm. Approved June 1, Your comments will receive careful consideration at a meeting of the responsible technical committee,1 which you may attend. Check for flatness with a ast, edge such as that of the tempered steel rule They do not distinguish between higher levels of adhesion for which more sophisticated methods of measurement are required.
When the peel angle and rate vary, the force required to remove the tape can change dramatically due to the rheological properties of the backing and adhesive.
ASTM D3359 Measuring Adhesion by Tape Test
For multicoat systems where adhesion failure may occur between or within coats, the adhesion of the coating system to the substrate is not determined. If the metal has not been reached make another grid in a different location.
The final step in the test is visual assessment of the coating removed from the specimen, which is subjective in nature, so that the coatings can vary among individuals evaluating the same specimen 9. Also, Test Method B is not considered suitable for lms thicker than 5 mils m.
Land Use and Development. Historical Version s – view previous versions of standard. Variation in pull rate and peel angle can effect large differences in test values and must be minimized to assure reproducibility 9.
Link to Active This link will always route to the current Active version of the standard. Adhesion is then rated by comparing film removed against an established rating scale.
ASTM D 3359 – 09 Standard Test Methods for Measuring Adhesion by Tape Test
Enter your personal account email address to request a password reset: However, with the tape test, failures within the substrate or coating layers are rare because the tape adhesive is not usually strong enough to aatm the cohesive strengths of normal substrates and organic coatings.
Limiting the range of rankings from 0 to 5 reflects the inability of this test method to make fine distinctions between levels of adhesion. The coating has flaked along the edges of cuts in large ribbons and whole squares have detached. Note 3It should be recognized that differences in adherability of the coating surface can affect the results obtained with coatings having the same inherent adhesion.
But it satm also be said that it is possible to obtain an indication of relative adhesion performance. After immersion, clean and wipe the asmt with an appropriate solvent which will not harm the integrity of the coating.
Signicance and Use 4.
If the substrate has not been reached make another X in a different location. Key steps that directly reect the importance of operator skill include the angle and rate of tape removal and the visual assessment of the tested sample.
Direct tests include the Hesiometer and the Adherometer 2.
ASTM D – 08 Standard Test Methods for Measuring Adhesion by Tape Test
A significant compressive force arises from the response of the tape backing material to being stretched. D359-08 an intact film is peeled cleanly by the tape, or if it debonds just by cutting into it without applying tape, then the adhesion is rated simply as poor or very poor, a more precise evaluation of such films not being within the capability of this test.
NOTE 3—It should be recognized that differences in adherability of the coating surface can affect the results obtained with coatings having the same inherent adhesion. In its simplest version a piece of adhesive tape is pressed against the paint lm and the resistance to and degree 10 The boldface numbers in parentheses refer to the list of references at the end of this test method.
F Standard Specification for Driven Fasteners: Then dry or prepare the surface, or both, as agreed upon between the purchaser asym the seller.
Cohesive failure within the coating film is also frequently observed. For large structures make sufficient tests to ensure that the adhesion evaluation is representative of the whole surface. The color under the tape is a useful indication of when good contact has been made.
Criteria deemed essential for a test to warrant large-scale acceptance are: Remove an additional length at a steady that is, not jerked rate and cut a piece about 75 mm 3 in.
Major limitations of the tape test are its d359-08 sensitivity, applicability only to coatings of relatively low bond strengths, and non-determination of adhesion to the substrate where failure occurs within a single coat, as when testing primers alone, or within or between coats in multicoat systems.
If more information is required about the tapes being evaluated in the D NOTE 6—If desired or specied, the coated test panels may be subjected to a axtm exposure such as water immersion, salt spray, or high humidity before conducting the tape test.